Can a transfer stay 3 years at UCLA?

[mikemac]

If you are bringing a substantial number of AP units then you can stay longer. UC policy says

Units granted for AP tests are not counted toward the maximum number of credits required for formal declaration of a major or the maximum number of units a student may accumulate prior to graduation. Students who enter UC with AP credit do not have to declare a major earlier than other students, nor are they required to graduate earlier.
AP credits | UC Admissions

So AP credit is like magic credit. You can use it towards earning enough units to graduate if you want, but you are not required to use them that way.